Hello,
as seen in the FreeFEM documentation, it is possible to construct surface meshes starting from two dimensional meshes using the command movemesh23. When doing this (for example in the case of a sphere) some points may merge.
I would like to be able to recover the correspondence between the points in the 2d mesh and the surface mesh in order to transport some finite element function from one mesh to another (e.g. the parametrization angles theta and phi). Is it possible to recover the correspondence between vertices in the 2d mesh and vertices on the surface mesh?
Can’t you use interpolate between two P_1 fespace, one defined on your meshS, the other on your mesh? For sure this works between meshL and mesh, see this example.
Thank you for your answer. I thought that interpolate is used for interpolation. Does it still work between a 2d mesh and a surface mesh? I will check it out.